Manufactured by Namura Kit includes piston, rings, pin, clips you get exactly what is pictured Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan Kit is for .060 over bore size 86.50mm Piston is 86.47mm Compression ratio of 11 1 Made in Taiwan Fits 1999 Honda TRX400EX Sportrax 2000 Honda TRX400EX Sportrax 2001 Honda TRX400EX Sportrax 2002 Honda TRX400EX Sportrax 2003 Honda TRX400EX Sportrax 2004 Honda TRX400EX Sportrax 2005 Honda TRX400EX Sportrax 2006 Honda TRX400EX Sportrax 2007 Honda TRX400EX Sportrax 2008 Honda TRX400EX Sportrax 2009 Honda TRX400X Sportrax 2012 Honda TRX400X Sportrax 2013 Honda TRX400X Sportrax 2014 Honda TRX400X Sportrax